Merge branch 'stack/agent-profiles-5-web-ui' into stack/agent-profiles-8-authoring

The composer's preset seat stays removed here — this layer moved it to the
hero chip and the session-header action — so only the model seat takes the
`modelSeatLocked` narrowing master introduced.

Conflicts:
	apps/web/tests/snapshots/*/*.expected.md
	packages/client/connection/README.md
	packages/client/connection/README.zh.md
	packages/client/ui-conversation/src/client/skeleton/InputBar.tsx
	packages/host/apiproxy/src/fetch/client.ts

examples/acp-agent/cordis.yml

@@ -9,8 +9,6 @@
 - id: llm-deepseek
   name: '@deepseek-ai/dsh-llm-deepseek'
   config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
-    baseURL: !!js process.env.DEEPSEEK_BASE_URL
     thinking: enabled
     reasoningEffort: max
     models:

examples/acp-agent/retry.cordis.yml

@@ -13,8 +13,6 @@
       - id: llm-deepseek
         name: '@deepseek-ai/dsh-llm-deepseek'
         config:
-          apiKey: !!js process.env.DEEPSEEK_API_KEY
-          baseURL: !!js process.env.DEEPSEEK_BASE_URL
           thinking: enabled
           reasoningEffort: max
           retryPolicy:

examples/acp-agent/tests/fs-search.cordis.yml

@@ -2,8 +2,6 @@
 - id: llm-deepseek
   name: '@deepseek-ai/dsh-llm-deepseek'
   config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
-    baseURL: !!js process.env.DEEPSEEK_BASE_URL
     models:
       - id: deepseek-v4-pro
 

examples/acp-agent/tests/pwsh.cordis.yml

@@ -2,8 +2,6 @@
 - id: llm-deepseek
   name: '@deepseek-ai/dsh-llm-deepseek'
   config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
-    baseURL: !!js process.env.DEEPSEEK_BASE_URL
     models:
       - id: deepseek-v4-pro